<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li>
                  <a title="全部" href="javascript:void(0);" @click="searchOne('')">全部</a>
                </li>
                <li v-for="(item,index) in subjectNestedList" v-bind:key="index" :class="{active:oneIndex==index}">
                  <a :title="item.title" href="javascript:void(0);" @click="searchOne(item.id, index)">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"/>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li v-for="(item,index) in subSubjectList" v-bind:key="index" :class="{active:twoIndex==index}">
                  <a :title="item.title" href="javascript:void(0);" @click="searchTwo(item.id, index)">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <div class="clear"/>
        </section>
        <div class="js-wrap">
          <section class="fl">
            <ol class="js-tap clearfix">
              <li :class="{'current bg-orange':buyCountSort!=''}">
                <a title="销量" href="javascript:void(0);" @click="searchBuyCount()">销量
                  <span :class="{hide:buyCountSort==''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':gmtCreateSort!=''}">
                <a title="最新" href="javascript:void(0);" @click="searchGmtCreate()">最新
                  <span :class="{hide:gmtCreateSort==''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':priceSort!=''}">
                <a title="价格" href="javascript:void(0);" @click="searchPrice()">价格&nbsp;
                  <span :class="{hide:priceSort==''}">↓</span>
                </a>
              </li>
            </ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total==0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <!-- 数据列表 开始-->
          <article v-if="data.total>0" class="comm-course-list">
            <ul id="bna" class="of">
              <li v-for="item in data.items" :key="item.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="item.cover" class="img-responsive" alt="听力口语">
                    <div class="cc-mask">
                      <a :href="'/course/'+item.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+item.id" :title="item.title" class="course-title fsize18 c-333">{{ item.title }}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span v-if="Number(item.price) === 0" class="fr jgTag bg-green">
                        <i class="c-fff fsize12 f-fA">免费</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                        <i class="c-999 f-fA">{{ item.viewCount }}人学习</i>
                        |
                        <i class="c-999 f-fA">{{item.sum}}评论</i>
                    </span>
                  </section>
                </div>
              </li>
            </ul>
            <div class="clear"/>
          </article>
          <!-- /数据列表 结束-->
        </div>
        <!-- 公共分页 开始 -->
        <div>
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="首页"
              @click.prevent="gotoPage(1)">首</a>
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="前一页"
              @click.prevent="gotoPage(data.current-1)">&lt;</a>
            <a
              v-for="page in data.pages"
              :key="page"
              :class="{current: data.current == page, undisable: data.current == page}"
              :title="'第'+page+'页'"
              href="#"
              @click.prevent="gotoPage(page)">{{ page }}</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(data.current+1)">&gt;</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="末页"
              @click.prevent="gotoPage(data.pages)">末</a>
            <div class="clear"/>
          </div>
        </div>
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>

<script>
  import course from '@/api/course'

  export default {

    data () {
      return {
        page:1,
        data:{},
        subjectNestedList: [], // 一级分类列表
        subSubjectList: [], // 二级分类列表
        searchObj: {}, // 查询表单对象
        oneIndex:-1,
        twoIndex:-1,
        buyCountSort:"",
        gmtCreateSort:"",
        priceSort:""
      }
    },

    //加载完渲染时
    created () {
      //获取课程列表
      this.initCourse()
      //获取分类
      this.initSubject()
    },

    methods: {
      //查询课程列表
      initCourse(){
        course.getPageList(1, 8,this.searchObj).then(response => {
          this.data = response.data.data
        })
      },
      //查询所有一级分类
      initSubject(){
        //debugger
        course.getNestedTreeList2().then(response => {
          this.subjectNestedList = response.data.data.items
        })
      },

      //点击一级分类，显示对应的二级分类，查询数据
      searchOne(subjectParentId, index) {
        //debugger
        this.oneIndex = index
        this.twoIndex = -1

        this.searchObj.subjectId = "";
        this.subSubjectList = [];

        this.searchObj.subjectParentId = subjectParentId;
        this.gotoPage(this.page)

        for (let i = 0; i < this.subjectNestedList.length; i++) {
          if (this.subjectNestedList[i].id === subjectParentId) {
            this.subSubjectList = this.subjectNestedList[i].children
          }
        }
      },

      //点击二级分类，查询数据
      searchTwo(subjectId, index) {
        this.twoIndex = index
        this.searchObj.subjectId = subjectId;
        this.gotoPage(this.page)
      },
      //购买量查询
      searchBuyCount() {
        this.buyCountSort = "1";
        this.gmtCreateSort = "";
        this.priceSort = "";
        this.searchObj.buyCountSort = this.buyCountSort;
        this.searchObj.gmtCreateSort = this.gmtCreateSort;
        this.searchObj.priceSort = this.priceSort;
        this.gotoPage(this.page)
      },
      //更新时间查询
      searchGmtCreate() {
        debugger
        this.buyCountSort = "";
        this.gmtCreateSort = "1";
        this.priceSort = "";
        this.searchObj.buyCountSort = this.buyCountSort;
        this.searchObj.gmtCreateSort = this.gmtCreateSort;
        this.searchObj.priceSort = this.priceSort;
        this.gotoPage(this.page)
      },
      //价格查询
      searchPrice() {
        this.buyCountSort = "";
        this.gmtCreateSort = "";
        this.priceSort = "1";
        this.searchObj.buyCountSort = this.buyCountSort;
        this.searchObj.gmtCreateSort = this.gmtCreateSort;
        this.searchObj.priceSort = this.priceSort;
        this.gotoPage(this.page)
      },
      //分页查询
      gotoPage(page) {
        this.page = page
        course.getPageList(page, 8, this.searchObj).then(response => {
          this.data = response.data.data
        })
      }
    }
  }
</script>

<style scoped>
  .active {
    background: #bdbdbd;
  }
  .hide {
    display: none;
  }
  .show {
    display: block;
  }
</style>
